What electrons participate in chemical bonding?
. the energy of shells in a hydrogen atom is calculated by the formula e = -eo/n^2 where n is any integer, and eo = 2.179x10^-18 j. so, the energy of a ground state electron in hydrogen is:
e = -2.179x10^-18 j / 1^2 = -2.179x10^-21 kj
consequently, to ionize this electron would require the input of 2.179x10^-21 kj
2. the wavelength of a photon with this energy would be:
energy = hc/wavelength
wavelength = hc/energy
wavelength = 6.626x10^-34 js (2.998x10^8 m/s) / 2.179x10^-18 j = 9.116x10^-8 m
converting to nanometers gives: 91.16 nm
3. repeat the calculation in 1, but using n=5.
4. repeat the calculation in 2 using the energy calculated in 3.
rain is the most common type of precipitation. the conditions for the other types are more rare than those required for rain.
the correct answer is
d. the warm water rises and the cooler water sinks.
no, it is not enthalpy favored since the chemical system gains energy.
the dissolution of ammonium nitrate in water is an endothermic process.
endothermic process requires the system to gain energy to can dissolve the particles in water.
so, the reaction is not enthalpy favored.